I suspect that the numbers will take a massive dive when the generation that were born in the 90's begin to reach middle age.
The long term effects of the unspeakably poor air quality and increasingly westernised diet post China's "modernisation" will begin to make an impact.
A series of calamities are going to hit China in the years ahead...their catastrophic one child policy is already backfiring, overdependence on fossil fuels, lack of natural resources and criminal industrial pollution will all begin to bite. Their military expansion and territorial ambitions are no coincidence.